G10 Phy Ch-14

What is electric current?

• A) The flow of positive charges only
• B) The flow of negative charges only
• C) The flow of both positive and negative charges
• D) None of the above

What is the unit of electric current?

• A) Joule
• B) Volt
• C) Ampere
• D) Ohm

Which of the following statements is true regarding the production of current in metals?

• A) The current is produced only due to the flow of positive charges.
• B) The current is produced only due to the flow of negative charges.
• C) The current is produced due to the flow of both positive and negative charges.
• D) None of the above

What is the formula for electric current?

• A) I = Q/t
• B) Q = It
• C) P = IV
• D) V = IR

What is the SI unit of current?

• A) Joule
• B) Watt
• C) Ampere
• D) Volt

What is the conventional direction of current flow?

• A) From negative to positive terminal of a battery
• B) From positive to negative terminal of a battery
• C) From the center to the circumference of a conductor
• D) None of the above

What is the term used for the potential energy per unit charge?

• A) Electrical potential
• B) Electric field
• C) Electric potential difference
• D) Electrical potential energy

Which of the following instruments can detect small current in a circuit?

• A) Voltmeter
• B) Ammeter
• C) Galvanometer
• D) Multimeter

How is electric current produced in an electrolyte?

• A) Only due to the flow of positive charges
• B) Only due to the flow of negative charges
• C) Due to the flow of both positive and negative charges
• D) None of the above

What is the value of current if 30 C charge passes through a wire in 5 seconds?

• A) 3 A
• B) 5 A
• C) 6 A
• D) 150 A