What is the momentum of a man of mass 75 kg when he walks with a uniform velocity of 2 m/s?

• 50 kg m/s
• 75 kg m/s
• 100 kg m/s
• 150 kg/s

At the center of the earth, the value of g becomes-

• Infinity
• Unity
• Zero
• None of these

Two unequal masses possess the same momentum, then the kinetic energy of the heavier mass is ………………..the kinetic energy of the lighter mass.

• smaller than
• greater than
• same as
• none of these

15 Bulbs of 60 W each, run for 6 hours daily and a fridge of 300 W runs for 5 hours daily. Find the forthright bill at the rate of 30 paise per unit?

• Rs. 31.05
• Rs. 45.55
• Rs. 62.10
• Rs. 75.10

Sheaths are used in cables to-

• Provide proper insulation
• Provide mechanical strength
• Prevent ingress of moisture
• None of these

For the stable operation of the interconnected system, the passive element that can be used as the interconnecting element is-

• Reactor
• Resistor
• Capacitor
• Resistor and Capacitor

The insulation resistance of a cable of length 10 km is 1 MΩ, its resistance for 50 km length will be-

• 1 MΩ
• 5 MΩ
• 0.2 MΩ
• 10 MΩ

The rate of change of momentum is directly proportional to-

• Force
• Inertia
• Moment
• None of these

If four 80 μF capacitors are connected in parallel, the net capacitance is-

• 20 μF
• 80 μF
• 160 μF
• 320 μF

The transformer used to decrease the magnitude of the alternating voltage is a-

• step-up transformer
• step-down transformer
• step-in transformer
• step-out transformer