physics

Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

• Current

• Voltage

• Resistance

• Resistivity

Thicker wires have _______ resistance than thinner wires.

• more
• less
• the same

As the resistance in a circuit increases, the electric current __________.

• increases
• decreases
• stays the same

Which device or devices could be removed without breaking the electric circuit?

• Only the bulb

• Only the switch

• The battery and the switch

• The bulb and the switch

An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

• 440 W

• 110 W

• 55 W

• 0.0023 W

How are resistance and length interrelated ?

• Directly Proportional

• Inversely Proportional

What happens to a thermistor on a hot day

• Resistance increases

• Resistance decreases

• Resistance is constant

• Resistance is unchanged

What happens to the resistance of the LDR when it is dark

• Resistance decreasae

• Resistance increases

• Resistance is constant

• Resistance is unchanged

A 10 cm length of wire has a reistance of 25 Ω (ohms).

A 30 cm length of the same wire will have a resistance of…

• 50 ohms

• 100 ohms

• 8 ohms

• 75 ohms

What is the unit of electric current?

• A) Ampere

• B) Volt

• C) Ohm

• D) Watt