GIZ - 8

Resistivity of a wire depends on :

• Length
• material
• cross section area
• All of the above

50HZ Means

• 1 cycle/sec
• 2 Cycles/sec
• 50 Cycles/sec
• 50 Cycles/min

In mutual induction, what passes between conductors in order to create voltage?

• radiation
• magnetic flux
• current flow
• resistance

Which of the following devices can be used to test the windings of an inductor for continuity?

• wattmeter
• voltmeter
• ohmmeter
• Wheatstone bridge

How many watts are in 100 microwatts?

• 0.01 milliwatts
• 0.1 milliwatts
• 1.0 milliwatts
• 10 nanowatts

A variable resistor:

• Has a fixed resistance.
• Changes with the amount of voltage applied.
• Has a movable arm that swipes across a coil that has less resistance at one end and more at the other.
• All of the above

All exposed metal in the electrical circuit should be:

• Earthed
• Connected
• Kept away
• Painted

The kinetic energy depends on…...

• the mass of the object and the square of its velocity
• the mass of the object and the square of its height
• the material of the object
• none of the above

Which force is described by Hook’s law?

• magnetic force
• friction force
• elastic force
• hydrostatic force

the momentum of a body

• is always different from zero
• is directly proportional to the speed
• depends on the force inside the body
• it is always constant