Question

please kindly do all question please

1) A Megohmmeter is an instrument for measuring very high resistance levels.

True or  False

2) A ladder network is a cascaded set of series-parallel combinations that has the appearance of a ladder.

True or  False

3) A transistor is a series-parallel circuit comprised of three variable resistors.

true or false

4) A transistor is a three terminal semiconductor electronic device that can be used for amplification and switching purposes.

true or false

5) An ammeter shunt is a series resistor that limits the current passing through the meter movement.

true or false

25) If a supply has internal resistance, the application of a load can affect the terminal voltage.

true or false

26) Increasing  RSERIES  in a voltmeter circuit will

a) help conserve energy by reducing the power consumption when VMAX is measured

b)increase VMAX, the maximum voltage that can be measured.

c) decrease VMAX, the maximum voltage that can be measured.

d) decrease the overall voltmeter resistance, thus reducing its loading effects.

27) Increasing  RSHUNT  in an ammeter will

a) decrease the ammeter series resistance, thus reducing loading effects.

b)  cause an increase in dissipated power when IMAX is measured.

c) increase imax the maximum current that can be measured.

d) decrease IMAX, the maximum current that can be measured.

33) Series-parallel networks are networks that contain both series and parallel circuit configurations.

true or false

34) The series resistor in a voltmeter

a) bypasses a portion of the current around the meter movement, allowing a low-voltage meter to be used in a high-voltage circuit

b) has a small resistance for a high-voltage range and a large resistance for a low-voltage range.

c) has a large resistance for a high-voltage range and a small resistance for a low-voltage range.

d) should be as small as possible to minimize voltmeter loading effects.

35) The voltage drops across all the elements in a parallel-series network is not equal to the source voltage.

true or false

36) To minimize potentiometer loading

a) the load resistance must be very small compared with the potentiometer resistance.

b) the load resistance must be very large compared with the potentiometer resistance.

c) only high-resistance potentiometers should be used.

d) connect a 1 Ω resistor between the wiper and the load.

37) Using the reduce and redraw approach to solve series -parallel networks, series and parallel elements can be simply added together.

true or false

38) What is the total resistance of a circuit consisting of the following values:  R 1 = 2.2 kΩ in series with a source voltage of 15 V dc;  R 2 = 1.5 kΩ and  R 3 = 2 kΩ, in parallel with each other and in series with  R 1; and  R 4 = 1 kΩ, in series with the parallel combination of  R 2 and  R 3?

A) 3200 Ω, B)1857 Ω, C) 4057 Ω, D) 6800 Ω

39) When a load is applied to a potentiometer, the voltage across a load connected to the wiper arm is determined solely by the potentiometer.

true or false

40) When solving a series-parallel circuit, begin by starting furthest away from the source and work backward toward the source.

true or false

Answer 1

1) true

Megohmeter is generally used to measure insulations which have high resistance values .

2) true.

Name ladder came because of its appearance. It look like ladder with series and parallel connections

3) false .

Transistor is a 2 junction device with 3 semiconductor regions .

4) true .

Transistor is a 3 terminal device.

It can be used as switch and as well as amplifier also.

CE mode is used as amplifier.