Q:1-Potential difference of 150 V is applied across an aluminum conductor of length 2.5 m. If the density of free electrons in the conductor is 2 x 10²³ m^-3, what would be the average drift velocity of the electrons? (Conductivity of aluminum is 3.5 2 x 10⁷ Ω^-1 m^-1 and charge on electron = 1.6 x 10 ^-19 C)
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650.25 m/s
450.65 m/s
656.25 m/s
414.55 m/s

Q:6-Which of the following is a dimensionally correct representation for angular momentum?
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M²L²T^-1
M²L¹T^-1
M²L¹T^-2
ML²T^-1

Q:7-A train at rest starts from station A and travels to station B at a distance of 2 km in 4 minutes? Consider the following statements.

Instantaneous speed of the train is 8.33 m/s
Average speed of the train is 8.33 m/s
Instantaneous acceleration of the train is 8.33 m/s²

Which of the following statement(s) is/are true?
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1
2
3
4

Q:8-A water gallon of mass 500 kg is resting on a horizontal floor. What would be its normal reaction?
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500 N
4900 N
5100 N
250 N

Q:9-A boy of 45 kg jumps out of a window and just before reaching the ground his speed is 2 m/s. After he hits the ground he stops and the total time taken during this process is 1 s. What is the force exerted by the ground on the boy?
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45 N
22.5 N
180 N
90 N

Q:10-A flying disc initially at rest rotates with a constant acceleration. If after 5 s the flying disc has rotated by 200 radians, what is its angular acceleration?
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14 rad/s²
15 rad/s²
11 rad/s²
16 rad/s²