| 1 |
What is the direction of the magnetic field lines inside a bar magnet? |
From north pole to south pole
From south pole to north pole
From side to side
There are no magnetic field lines.
|
| 2 |
Which statement is true about the magnetic poles? |
Unlike poles repel
Like poles attract
Magnetic poles do not effect each other
A single magnetic pole does not exist
|
| 3 |
The equivalent resistance of a parallel combination is |
equal to sum of all resistance
is greater than the largest resistance of combination
is smaller than the smallest resistance of combination
All of these
|
| 4 |
When resistance are connected in series the current passing through them is . |
Different
Zero
The same
None of these
|
| 5 |
The property of substance, which opposes the flow of current through it is called. |
Resistance
Reactance
Resistivity
None of these
|
| 6 |
As the temperature of a conductor rises, its resistance. |
Increase
Decrease
Does not change
None of these
|
| 7 |
Current is equal to: |
IR<sup>2</sup>
CV
Q/t
IR
|
| 8 |
Specific resistance of copper is ____________ x 10-8Ohm-meter |
1.62
1.69
5.25
2.75
|
| 9 |
Specific resistance of silver = ________ x 10-sOhm-meter |
5.25
2.75
1.69
1.62
|
| 10 |
The resistance of voltmeter is: |
zero
low
Very high
10Ω
|
| 11 |
That period in which voltage repeats its value in equal intervals is called: |
cycle
Time period
Frequency
Amplitude
|
| 12 |
The current which changes its direction is called: |
Current
A.C.
Conventional current
D.C.
|
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