Electricity Assertion- Reason Questions

Assertion: The connecting wires are made of copper Reason: The electrical conductivity of copper is high

• a
• b
• c
• d

Assertion: When the length of a wire is doubled, the resistance also gets doubled Reason: The resistance of a wire is directly proportional to its length

• a
• b
• c
• d

Assertion: The 200 W bulbs glow with more brightness than 100 W bulbs Reason: A 100 W bulb has more resistance than 200 W bulb

• a
• b
• c
• d

Assertion: A voltmeter and ammeter can be used together to measure resistance but not power Reason: Power is proportional to voltage and current

• e
• a
• b
• c
• d

Assertion: Electrical appliances with metallic body have 3 connections. Reason: Three pin connections reduce heating of connecting wires

• a
• b
• c
• d
• e

Assertion: When the resistances are connected between the same two points, they are said to be connected in parallel. Reason: In case the resistance is to be decreased, then the individual resistances are connected in parallel.

• a
• b
• c
• d

Assertion: Long distance transmission is done at high voltage. Reason: At high voltage supply, power losses are less.

• a
• b
• c
• d

Assertion: The product of resistivity and conductivity of a conductor depends on the material of the conductor Reason: Because each of resistivity and conductivity depends on the material of the conductor

• a
• b
• c
• d

Assertion: A resistor of resistance R is connected to an ideal battery. If the value of R is decreased, the poser dissipated in the circuit will increase. Reason: The power dissipated in the circuit is directly proportional to the resistance of the circuit.

• a
• b
• c
• d

Assertion: Insulators do not allow flow of current through themselves Reason: They have no free-charge carriers.

• a
• b
• c
• d