Physics Test

Result

Physics Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

A

Option 3

B

Option 2

C

Option 1

D

Option 4
Question 2
1 / -0

Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area A = 10 cm^2 and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual inductance is (µ0 = 4π × 10^-7 Tm A^-1)

A

4.8 π × 10^-4 H

B

2.4 π × 10^-4 H

C

4.8 π × 10^-5 H

D

2.4 π × 10^-5 H
Question 3
1 / -0

A

Option 1

B

Option 2

C

Option 3

D

Option 4
Question 4
1 / -0

A planet in a distant solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 kms^−1, the escape velocity from the surface of the planet would be

A

110 kms^−1

B

1.1 kms^−1

C

11 kms^−1

D

0.11 kms^−1
Question 5
1 / -0

A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit.

A

All of these

B

Option 3

C

Option 1

D

Option 2
Question 6
1 / -0

Directions: Question is based on the following paragraph. A current loop ABCD is held fixed on the plane of the paper as shown in the figure. The arcs BC (radius = b) and DA (radius = a) of the loop are joined by two straight wires AB and CD. A steady current I is flowing in the loop. Angle made by AB and CD at the origin O is 30 deg. Another straight thin wire with steady current I1 flowing out of the plane of the paper is kept at the origin.

A

Option 2

B

Option 3

C

Option 4

D

Option 1
Question 7
1 / -0

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can beestimated to be in the range

A

20,000 J − 50,000 J

B

2 × 10^5 J − 3 × 10^5 J

C

2,000 J − 5,000 J

D

200 J − 500 J
Question 8
1 / -0

One kg of a diatomic gas is at a pressure of 8 × 10^4 N/m^2. The density of the gas is 4 kg/m^-3. What is the energy of the gas due to its thermal motion?

A

7 × 10^4 J

B

5 × 10^4 J

C

3 × 10^4 J

D

6 × 10^4 J
Question 9
1 / -0

A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young’s double slit and gives rise to two overlapping interference patterns on the screen. The central maximum of both lights coincide. Further, it is observed that the third bright fringe of known light coincides with the 4th bright fringe of the unknown light. From this data, the wavelength of the unknown light is

A

442.5 nm

B

393.4 nm

C

885.0 nm

D

776.8 nm
Question 10
1 / -0

The surface of a metal is illuminated with the light of 400 nm. The kinetic energy of the ejectedphotoelectrons was found to be 1.68 eV. The work function of the metal is (hc = 1240 eV nm)

A

1.68 eV

B

1.41 eV

C

151 eV

D

3.09 eV