Question

[5]28. Which of the following are FALSE statement(s). Give your answer in the form "X". Do not include the " " symbols in your answer. (a). A magnetic dipole moment in units of seconds) can be approximated as at least 5 RC time constants. (b). When a DMM is used to measure the current in a device, the DMM must be connected in series with the device. (c). A capacitor stores electric energy in the magnetic field between the plates. This is the dielectric strength. (d). If a proton is moving in a magnetic field with a speed of 3.0 x 106 m/s and it encounters a 5.0 T magnetic field, the proton's speed will increase to 15 x 106 m/s almost instantaneously. (e). When a DMM is used to measure the voltage across a device, the DMM must be connected in parallel with the device,

Answer 1

(a). A magnetic dipole moment (in units of seconds) can be approximated as at least 5 RC time constants.

FALSE

There is no relation between magnetic dipole moment and RC time constant of Resistance-capacitance series circuit. Magnetic dipole moment interacts with magnetic field , whereas RC time constant is related to charging or discharging the capacitor in series resistor-capacitor circuit using Electric potential difference.

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(b). When a DMM is used to measure the current in a device, the DMM must be connected in series with the device.

TRUE

To measure the current passing through the device , Digital Multimeter ( DMM) that is set in current measuring mode should be in series with the device so that same current is passing through DMM and device.

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(c). A capacitor stores electric energy in the magnetic field between the plates. This is the dielectric strength.

FALSE

Capacitor stores electric energy in electric field between plates

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(d). If a proton is moving in a magnetic field with a speed of 3.0 x 106 m/s and it encounters a 5.0 T magnetic field, the proton's speed will increase to 15 x 106 m/s almost instantaneously

FALSE

Magnetic field will only deflect the charged particle. Magnetic field will not do any work on the charged particle. Hence speed of charged particle will not change in magnetic field.

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(e). When a DMM is used to measure the voltage across a device, the DMM must be connected in parallel with the device.

TRUE

If DMM that is set as Voltage measuring mode and the device are in parallel , they are at same potential difference.