Electric Circuits Answers

A flat silver strip of width 1.5cm and thickness 1.5 mm carries a current of 150 A . A magnetic field of 2T is

applied perpendicular to the flat face of the strip. The emf developed across the width of the strip is measured

to be 17.9 μV. Calculate the free electron density in the silver

The magnitude of the acceleration of an object moving along a straight line is equal to the?

A. slope of the displacement time graph

B. Area below the force-time graph

C. Slope of its velocity-time graph

D. Area under its velocity-time graph

In which compounds are there just sigma covalent bonds?

A.CH4

B. C2H2

C. C2H4

D. C5H12

The magnitude of the acceleration of an object moving along a straight line is equal to the?

A. slope of the displacement time graph

B. Area below the force-time graph

C. Slope of its velocity-time graph

D. Area under its velocity-time graph

When the temperature of a rod of copper is increased, its length:

A. Increases B. Decreases C. stays the same

A girl whose mass is 150 kg walks up a flight of 12 steps each 20 cm high in 2 second. Find the power she developed in Watts assume g = 10 m/s2

Which of the following statement is true concerning the reactive power?

1. It is the peak rate of energy storage in the active elements

2. It is the rate of doing work expressed in kW

3. It is the peak rate of energy storage in the reactive elements

4. It is the rate of energy storage in the purely resistive load