Quiz on Direct Current Voltage (DC)

What is the primary function of a battery in an electric circuit?

• To measure current

• To provide a source of voltage

• To divide voltage

• To connect components in series

What does a multimeter measure?

• Only resistance

• Both voltage and current

• Only current

• Only voltage

In a series circuit, what happens to the current?

• It increases at each component

• It remains the same throughout

• It decreases at each component

• It is divided among components

How is a voltmeter connected in a circuit?

• In parallel with the lamp

• In series with the battery

• In series with the lamp

• In parallel with the battery

What is the unit of electric current?

• Volts

• Ohms

• Watts

• Amperes

What happens if a lamp in a parallel circuit burns out?

• The current doubles

• The voltage increases

• Only the branch with the lamp stops working

• The entire circuit stops working

What is the law of uniqueness of voltages in a parallel circuit?

• U = U1 + U2

• U = U1 = U2

• I = I1 + I2

• I = I1 = I2

What does an ammeter measure?

• Current

• Resistance

• Voltage

• Power

What is the effect of an open switch in a circuit?

• It stops current flow

• It allows maximum voltage

• It increases current flow

• It acts as a wire

What is the first step in using an oscilloscope?

• Choose the time base scale

• Switch on the oscilloscope

• Select a channel

• Connect the dry cell