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Ultimate Physics Challenge

Test your knowledge of physics concepts with our Ultimate Physics Challenge! This quiz consists of 56 carefully curated multiple-choice questions that cover a range of topics from electrical circuits to thermodynamics.

Whether you're a student brushing up for an exam or a teacher seeking to reinforce your understanding, this quiz is perfect for everyone.

56 multiple-choice questions
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56 Questions14 MinutesCreated by ExploringAtom21

125-Ohm's law is applicable only when temperature remains

Changing

Constant

Absolute zero

None of these

126-If a charge of 2C is moving with 5 m/s enter in 3T, calculate the force experience by it

10 N

20 N

15 N

30 N

127-Which of the following are component of half wave rectifier?

Transformer

Power supply

Load resistance

All of these

128-Which of the following is not an assumption of the kinetic model of an ideal gas?

The size of the molecules is much smaller than the separation between molecules

Molecules suffer negligible momentum change during wall collisions

Molecules don't exert force on each other except during a collision

The gas molecules are in random motion and may change their direction of motion after every collision

129-The angular displacement of an object after one complete revolution is

0 radiation

Pi radian

2 pi radian

1/3 pi radian

130-Coulomb force is a

Short range force

Long range force

Medium range force

None of these

131-Motional emf induced in a coil is dependent on

Magnetic field

Orientation

Length

All of these

132-Work function depends on

Metals only

Nature of surface only

Both metals and nature of surface only

Threshold frequency

133-Formula of power is

P=IV

P=V+I

P=V//I

P=VQ

134-Three types of radioactive elements are emitted when unstable nuclei undergo radioactive decay. Which of the following is not one of them?

Alpha

Beta

Gamma

Delta

135-The bridge rectifier is preferred to an ordinary two diode full wave rectifier because

It needs much smaller transformer for the same output

No center tap is required

Less PIV rating per diode

All of these

136-Ohm's law is valid when the temperature conductor is

Very low

Very high

Varying

Constant

137-Mass and energy are related to each other by?

Newton's law

Coulomb law

Einstein's law

All of these

138-The nuclear forces are considered as

Strong forces

Weak force

Electromagnetic force

All of these

139-Consider a car is travelling for one hour. In which of the following cases the average velocity is zero?

Car travels 20 Km due east

Car travels 60 Km due east, then turns around and travels 40 Km due west

Car travels 70 Km due east

Car travels 30 Km due west, then turns around and travels 30 Km due east

140-What is the de Broglie wavelength associated with an electron, accelerated through a potential difference of 200 volts?

1 nm

0.0056 nm

0.5 nm

0.086 nm

141-Consider a car is travelling for one hour. Which of the following trips have the same average velocity?

Car travels 20 Km dua east and car travels 70 Km due east

Car travels 40 km due east, then turns around and travels 20 km due west and car travels 20 km due east

Car travels 70 km due east and car travels 40 km due east , then turns around and travels 20 km due west

Car travels 30 km due west , then turns around and travels 30 km due east and car travels 40 km due east , then turns around and travels 20 km due west

142-In a centre tap full wave rectifier if Vm is the peak voltage across the secondary of transformer, the maximum voltage across reverse bias is

Vm/2

2Vm

Vm/3

143- C-14 HAS HALF-LIFE 5700 YEARS. At the end of 11400 years , the actual amount left is

0.0625 of original amount

0.5 of original amount

0.25 of original amount

0.125 0f original amount

144-Consider two capacitors with capacitance 2 micro F and 4 micro F . With which type of connection will the 4 micro F capacitor have a great amount of stored energy than the 2 micro F capacitor?

Series

Parallel

Either series or parallel

Neither series nor parallel

145-The oscillating object overshoots the rest position due to

Restoring force

Inertia

Gravitational P.E

Elastic P.E

146- ............... Relationship between current and voltage in terms of Ohm's law

Non-linear

Varying

Linear

None of them

147-The nuclus is made up more neutrons than protons

None of these

148-The black body always ....... radiations

Emits

Absorbs

Both emits and absorbs

Reflects

149-An electrical instrument which which is used to measure potential difference between two points is called

Barometer

Galvanometer

Manometer

Voltmeter

150-The frequency of applied A.C is 2 KHz. Its time period will be

0.5 x 10^-3 sec

0.5 second

2 sec

5 sec

151-Velocity is a

Tensor

Scalar

Vector

None of these

152-Effect of work is equal to

Change in total energy

Chnage in the K.E

Change in power

None of these

153-The electron volt is the unit of

Electric current

Electric potential

Electric energy

Electron flux

154-Which of the following frequency of sound wave is audible

5 Hz

5000 Hz

2500 Hz

50 Hz

155-Rectifier is a device which converts

AC to DC

DC to AC

AC to Triangular current

DC to triangular current

156-In mass-spring system, which of the following does not depend on the initial displacement of the spring?

Maximum kinetic energy of the mass

Average speed of the mass

Total energy of the mass

Angular frequency of the oscillation

157-A circuit that adds positive or negative voltage to an input sine wave is called

Clamper

Clipper

Diode clamp

Limiter

158-Which isotope has highest momentum when moving with same velocity

Protium

Tritium

Deuterium

All of these have same momentum

159-Why should a resistance be induced in a circuit in series deliberately?

To increase current

To decrease current

To control current

Just to give a good look to the circuit

160-The value of permittivity of material, other than air space is

Greater than unity

Less than unity

Equal to unity

Zero

161-Acceleration of a moving car when brakes are applied is

Negative

Positive

Zero

Infinite

162-The clouds are formed when water ...... heat

Absorb

First absorb then release

Release

First release then absorb

163-If velocity of charged particle and magnetic field are at a fix angle not 90 then path will be

Circular

Spherical

Straight line

Helical

164-A particle radioisotope has a half life of 5 days. In 15 days the probability of decay in percentage will be

67 %

82.5 %

87.5 %

77 %

165-Photocell is similar to

Photoelectric effect

Compton's effect

Photoluminescence

None of these

166-In constant linear acceleration, angular acceleration and radius are

Equal

Inversely related

Directly related

No relation

167-Acceleration of rolling object is zero at ....... Point of hill

Highest

Lowest

Middle

None of these

168-Bright lines in pattern show

Absorption

Emission

Release

Free particle

169-The density of oxygen is 16 times the density of hydrogen. If the speed of sound in oxygen is v, then what is the speed of sound in hydrogen?

V/4

V/2

170-An object is undergoing simple harmonic motion.It;s time period is T and total energy is E. The amplitude of vibration is reduced to half. What is the new time period and total energy of the system?

Time period=T/2total energy = E/4

Time period =T total energy = E/4

Time period = T/2 total energy =E/2

Time period = T total energy = E/2

171-An object is moving in a circle. It completes 6 revolution in every 3 seconds. What is its frequency?

0.5 pi Hz

0.5 Hz

2 pi Hz

2 Hz

172-Two wires of copper are of the same length but have different diameters. When they are connected in series across a battery , the heat generated is H1. When connected in parallel across the same battery, the heat generated during the same time is H2. Then

H1=H2

H1>H2

H1 is less than H2

NONE

173- 1 light year distance is

Distance travelled by earth in one year

Distance travelled by star in one year

Distance travelled by light in one year

Distance travelled by light in one galactic year

174-The displacement time graph of a particle moving with uniform velocity is

Parabola

Circle

Straight line

Hyperbola

175-An electron travels due north through a vacuum in a region of uniform magnetic field 'B' that is also directed due north. It will

Be unaffected by the field

Speed up

Slow down

No ne of these

176-Two bodies of masses m and 2m have same momentum . Their respective kinetic energies K.E1 and K.E2 are in the ratio

1:2

2:1

1:(2 under-root)

1:4

177-The magnitude of 1/(4 pi epsilon not)

9 x 10^9 volt

9 x 10^-9

8.85 x 10^-12

178-The maximum Lyman series is

1/R square

C/R

1/RC

4/3R

179-The P.E gained by projectile is doubled when it reaches at maximum height is expressed by equation

K.Eicos2 theta

K.Eisin2 theta

K.Ei tan theta

K.Ei cot theta

180-If the time of flight of projectile is doubled its height becomes

Doubled

Unchanged

4 times

Halved

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