CIE Physics Paper-1: Specimen Questions 104 - 105 of 109
Question number: 104
Which statement is correct?
An earth wire is needed to prevent the fuse blowing.
A fuse should be connected to the neutral wire in a plug.
A fuse is included in a circuit to prevent the current becoming too high.
An electric circuit will only work if it includes a fuse.
Fuse is made up of small wire of law melting point material. High current is damage the electric component (like bulb). As high current passes through fuse due to heat the fuse wire will melt and connection will open. So if we connect fuse in series in circuit, it prevent the circuit from high current.
Question number: 105
For measuring potential difference across the cell, which one is the correct connection for the voltmeter?
The potential difference between two points is always measured across (parallel to) the points. So, for measure the potential difference across the cell, voltmeter should be connected in parallel position to the cell. So choice A is right.