1.
Which instrument is used for measuring electric potential
2.
What will be the change in the value of resistance, if length of a conductor and it’s radius is doubled?
3.
What is the commercial unit of electrical energy?
4.
Conventionally the direction of the current is taken as
5.
The magnitude of charge on an electron is
6.
1 coulomb charge is equivalent to about
8.
Unit of electric potential is
9.
Work done to move a charge from one point to another of a conductor is
10.
Unit of electric current is
11.
Unit of resistance is
12.
Resistance of a metallic conductor
13.
Resistance of a conductor varies
14.
Resistivity of a conductor
15.
Two resistances 1 ohm and 2 ohm are connected in series and then in parallel. The ratio of the effective resistance of series and parallel combination of resistances is
16.
A wire of resistance R is cut into five equal pieces. These pieces are connected in parallel and the equivalent resistance of the combination is R’. then the ratio R/R’ is
17.
Which of the following expressions does not represent the electric power in the circuit?
18.
An electric heater is rated 100 W and 220 V. if it is operated on 110V. the power consumption will be
19.
Electric power is given by
20.
What is not the unit of energy?
21.
Work done to move 1 coulomb charge from one point to another point on a charged conductor having potential 10 volt is
22.
Two conducting wires of same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combination would be
23.
A current of 0.5 A passes through a conductor in 2 sec. how many electrons flow through the conductor from its one end to the other end during this interval of time?
24.
The resistance of a conductor is R. if its length is stretched to double, then its new resistance will be
25.
Manganin is an alloy of
26.
If the length of a conductor having resistivity 1.5* 10 to the power -8 ohm-m is doubled, its new resistivity will be
27.
Calculate the length of aluminium wire of area of cross section 1 mm² whose resistance is 1.56 * 10 to the power -2 ohm. Given resistivity of aluminium is 2.6* 10 to the power -8 ohm-m
28.
The hindrance presented by material of conductor to the smooth passing of electric current is known as
29.
A conductor of resistance 10 ohm is connected to a cell of emf 2V. the current flowing through the conductor is
30.
A current of 0.1 A flows through a conductor of resistance 10 ohm. The potential difference across the ends of the conductor is
31.
The amount of heat produced in a conductor is
32.
1 horse power is equal to
33.
The amount of heat energy produced in 5 minutes by an electric heater rated at 1000W is
34.
The power of a source of energy producing 600J energy in 30 s is
35.
The unit of electrical energy is
36.
An electric bulb is rated 100W when used on 200V main supply. The resistance of the bulb is
37.
Two wires of same length and area made of two materials of resistivity p1 and p2 are connected in series to a source of potential V. the equivalent resistivity for the same area is
38.
Devices are connected between two points say A and B in parallel. The physical quantity that Two will remain the same between the two points is
39.
The unit of specific resistance is
40.
The unit of emf of a cell is
41.
Kilowatt hour is the unit of
43.
Two bulbs are rated 40W,220V and 60W,220V. The ratio of their resistances will be
44.
The least resistance obtained by using 2ohm, 4ohm,1ohm and 100ohm is
45.
A fuse wire repeatedly gets burnt when used with a good heater. If it advised to use a fuse wire of
46.
A circuit has a change of 2C moving through it is 3 s. Which electrical component in the circuit, if present, will show the current?
47.
Unit of electric power may also be expressed as
48.
Two resistors connected in series give an equivalent resistance of 10 ohm. When connected in parallel, give 2.4 ohm. Then the individual resistance is
49.
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 ohm. The work done in 10 seconds is
50.
A boy records that 4000joule of work is required transfer 10 coulomb of charge between two points of a resistor of 40 ohm. The current passing through it
