Electrical Measuring Instruments
Physics ⇒ Electricity and Magnetism
Electrical Measuring Instruments starts at 9 and continues till grade 12.
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See sample questions for grade 10
A digital voltmeter displays a reading of 5.00 V. How many significant figures are in this measurement?
A galvanometer shows full-scale deflection for a current of 1 mA. What is the maximum current it can measure without modification?
Describe the function of a shunt in an ammeter.
Explain why a shunt is used in an ammeter but not in a voltmeter.
A digital voltmeter displays a reading of 5.00 V. How many significant figures are in this measurement?
A galvanometer has a resistance of 50 Ω and shows full-scale deflection at 2 mA. What value of shunt resistance is needed to convert it into an ammeter of range 10 A?
A galvanometer shows full-scale deflection for a current of 1 mA. What is the maximum current it can measure without modification?
A student connects a voltmeter in series with a resistor in a circuit. Will the voltmeter show the correct reading? Yes or No.
Which instrument is used to measure both AC and DC currents? (1) Moving coil galvanometer (2) Moving iron instrument (3) Hot wire instrument (4) Both 2 and 3
Which instrument is used to measure electric current in a circuit? (1) Voltmeter (2) Ammeter (3) Ohmmeter (4) Galvanometer
Which instrument is used to measure electrical resistance? (1) Ammeter (2) Voltmeter (3) Ohmmeter (4) Galvanometer
Which instrument is used to measure the energy consumed by an electrical appliance? (1) Ammeter (2) Voltmeter (3) Energy meter (4) Galvanometer
A moving coil galvanometer can be converted into a voltmeter by connecting a ________ resistance in series with it.
A voltmeter is always connected in ________ with the component across which the potential difference is to be measured.
A voltmeter is designed to have ________ resistance so that it draws minimal current from the circuit.
The device used to compare the emf of two cells is called a ________.
A student connects a voltmeter in series with a resistor in a circuit. Will the voltmeter show the correct reading? Yes or No.
A student uses a voltmeter with a resistance of 10,000 Ω to measure the voltage across a 100 Ω resistor. Will the voltmeter significantly affect the circuit? Yes or No.
True or False: A digital multimeter can measure both AC and DC quantities.
True or False: A galvanometer can be converted into an ammeter by connecting a low resistance in parallel with it.
