QUESTIONS
VERY SHORT ANSWER TYPE QUESTIONS (1 Mark)
1. Define S.I. unit of:
(a) Electric current
(b) Potential difference
(c) Resistance
(d) Electric power
(e) Electrical energy consumed
2. Define the term resistivity.
3. Device used for measuring the current is.
4. Name the element of filament of a bulb.
5. Write two types of resistors combination
6. How the voltmeter is connected in a circuit?
7. How the ammeter is connected in a circuit?
8. Why the filament of bulb has high melting point ?
9. How does fuse wire protect electrical appliances ?
10. Define IKWh in them of joints.
11.on what factors does resistance of a conductor depend.
Answers
Answer:
1
a.Ampere
b.volt
c.ohm
d.watt
e.joule
2.Resistivity of a substance is numerically equal to the resistance of the substance if the conductor is 1m long and 1m2 in area of cross section.
3.ammeter
4.tungsten
5.resistors in series and resistors in parallel
6.volmeter is connected in parallel in a circuit.
7.ammeter is connected in series in the circuit
8.filament of a bulb has high melting point so that it will become white hot and emit light without melting.
9.fuse wire protect electrical appliance bcz if their is the high supply of flow of current then the fuse will melt hence the circuit will break thus the appliances doesn't get damaged.
10.when the appliance has the power of 1 kW and is used for 1 h then the amount of energy consumed is said to be 1 kWh.
11.resistance depende upon
length
area of cross section
temperature
the nature of material used
Hope this solution may help you..