"Physics Pulse: MCQ Mastery Series"

The net charge flowing across an area in time t is given by:

The formula for current I for steady current is:

If the calculated current I is negative, it indicates:

• (a) No current is flowing
• (b) Current is in the forward direction
• (c) Current is in the backward direction
• (d) Current flow is constant

The expression for instantaneous current is:

Instantaneous current is defined as the:

• a) Average charge flowing per second
• (b) Instantaneous charge flow at any given time
• (c) Net charge flow across a conductor
• (d) Total charge flow during a time interval

The SI unit of electric current is:

• (a) Volt
• (b) Ampere
• (c) Ohm
• (d) Coulomb

One ampere is equivalent to:

• (a) One coulomb of charge flowing per second
• (b) One volt per second
• (c) One ohm per second
• (d) One joule per second

Which of the following devices typically operates at a current in the range of a few amperes?

• (a) Lightning
• (b) Domestic appliances
• (c) Nervous system
• (d) High-power transformers

The current in the nervous system is typically measured in:

• (a) Amperes
• (b) Milliamperes
• (c) Microamperes
• (d) Nanoamperes

What happens to the magnitude of current if the time interval t decreases while the net charge Q remains constant?

• (a) Current decreases
• (b) Current increases
• (c) Current remains constant
• (d) Current becomes zero