Mock Exam Revision C4-Electricity

What is an open circuit?When the switch is onwhen the switch is offWhen the circuit has extremely high resistance (correct)When the circuit has extremely low resistance

• When the switch is closed.

• None of the choices is correct.

• When the circuit has extremely high resistance.

• When the circuit has extremely low resistance.

What is following circuit made up of?

• Battery, inductor, resistor ,capacitor.

• Inductor ,light bulb, resistor, capacitor.

• Battery, multimeter , light bulb, inducator.

• Switch , wire ,capacitor, indicator.

If 750 µA is going through 11 kilo ohms of resistance, what is the voltage across the resistor?

• 146 V

• 14.6 V

• 8.25 V

• 200 V

Using the following circuit diagram of a DC parallel circuit, calculate total current

• 3.34 A

• 0.79 A

• 2.14 A

• 6.2 A

What is the difference between series and parallel circuits in terms of voltage?

• In series: Vt= V1+V2+V3   

  In parallel: Vt = V1= V2=V3

• In series: Vt = V1= V2=V3

  In parallel: Vt= V1+V2+V3

• In series: Vt= V1+V2+V3   

  In parallel: Vt= V1+V2+V3

• In series: Vt= V1xV2xV3

  In parallel: Vt= V1+V2+V3

What is the right symbol for this picture?

• Microphone.

• Loud speaker.

• Wattmeter.

• Headphone.

If the total resistance in a series circuit doubles, how will the current change? will:be the samebe halvedbe doubledbe triple

• The current will saty te same.

• The current will be halved.

• The current will be doubled.

• The current will be tripled.

What is the power used by the specktron taking 5 A at 210V?

• 1050 W

• 0.024 W

• 42 W

• 5250 W

With the same applied voltage, any branch that has less resistance allows more current through it than a branch with higher resistance.

• True.

• False.

What is the frequency of a wave that has wavelength of 25m?(C=3.0*10^8m/s)7.5*10^8 👍🏻12*10^67.5*10^983.3*10^-9