Electric Circuits and Measurements

What is the effect on capacitance when the distance between the plates is increased?

It increases
It becomes zero
It decreases (correct)
It remains the same

What is the symbol for capacitance?

Q
V
C (correct)
I

What is the effect on capacitance when the area of cross section of the plates is decreased?

It decreases (correct)
It becomes zero
It remains the same
It increases

How are capacitors connected in series?

In series (D) Signup and view all the answers

What is the total charge in the given circuit: CE = C1 + C2 + C3 = 0.1 + 0.2 + 0.3 = 0.6μF?

7.2μC (A) Signup and view all the answers

What is the energy transferred to the lamp in the given example: A 6V battery supplies a current of 0.5 A to a lamp for 3 minutes?

54J (C) Signup and view all the answers

What is the charged particle that flows in a circuit?

Electrons (B) Signup and view all the answers

What is the SI unit of Potential Difference?

Volts (C) Signup and view all the answers

What is the relation between EMF and terminal potential difference when no current flows?

EMF is equal to terminal potential difference (A) Signup and view all the answers

What is the main function of resistance in an electrical circuit?

To control the electron flow in a circuit (A) Signup and view all the answers

What is the unit of resistance?

Ohms (D) Signup and view all the answers

What is the relation between Charge, Current, and time?

Charge is directly proportional to Current and time (A) Signup and view all the answers

What is produced around a conducting wire when a current flows through it?

A magnetic field (D) Signup and view all the answers

What happens to the strength of a magnetic field when the current through the wire is increased?

It increases (B) Signup and view all the answers

What is the effect of increasing the distance from the wire on the strength of the magnetic field?

It decreases (D) Signup and view all the answers

What is a solenoid?

A coil of wire used to produce a magnetic field (C) Signup and view all the answers

What is the purpose of adding an iron core to a solenoid?

To increase the strength of the magnetic field (D) Signup and view all the answers

What is the name of the rule used to determine the direction of the force in a motor?

Fleming's Left-Hand Rule (B) Signup and view all the answers

What is the direction of the magnetic field when looking at the wire next to the North seeking pole of the magnet?

Pointing to the right (A) Signup and view all the answers

What is the unit of Magnetic Flux Density?

Teslas (B) Signup and view all the answers

What is the formula for the force on a conductor?

F = BIl (C) Signup and view all the answers

What is the pH of a neutral solution?

pH 7 (C) Signup and view all the answers

What is the formula for the torque produced by the armature of a simple DC motor?

T = nBIld (D) Signup and view all the answers

What is the purpose of the pH scale?

To classify a solution as acidic, alkaline, or neutral (D) Signup and view all the answers

What is the unit of frequency?

Hertz (B) Signup and view all the answers

What is the formula to calculate the period of a wave?

Period = 1/frequency (D) Signup and view all the answers

What is the speed of a wave with a wavelength of 3m and a frequency of 2 Hz?

6 m/s (A) Signup and view all the answers

Why do sound waves travel faster through solids than through gases?

Because solids are more densely packed than gases (A) Signup and view all the answers

What type of wave causes the medium to move perpendicular to the direction of the wave?

Transverse wave (B) Signup and view all the answers

What is the distance traveled by a given point of a wave during a given time interval?

Velocity (B) Signup and view all the answers