07a. Resistance/Resistor. - Parte 66

The resistance of a material is. independent of the material type. the same as its conductance. the reciprocal of its conductance.

Resistance is measured using what unit of temperature?. Absolute. Centigrade. Fahrenheit.

A resistor has 4 bands on it coloured blue, yellow, yellow, gold. It’s value is. 640 kΩ ± 5%. 6.4 mΩ ± 10%. 64 kΩ ± 5%.

The electron flow through a conductor will be decreased the most if the cross sectional area. is decreased and the length is increased. and the length are both decreased. and the length are both increased.

Small resistors too small or mis-shapen for the application of colour are marked instead using. an abbreviated resistance value. a letter code. a dot code.

Total resistance in a parallel resistor circuit, of R1 and R2 is. RT = 1/R1 + 1/R2. 1/RT = (R1 * R2) ÷ (R1 + R2). 1/RT = 1/R1 + 1/R2.

If the resistance of a resistor which is in series with two other resistors is doubled. the current in that resistance is doubled. the volts drop across that resistor increases. the current in that resistance is halved.

The total resistance of the circuit shown is. 3 Ohms. 1.33 Ohms. 12 Ohms.

Potentiometers are used as a. variable voltage source. variable resistor. variable current source.

In a Wheatstone Bridge, the ammeter reads zero, and the variable resistor is adjusted to 5 ohms. Resistor P has a value of 10 ohms and Q has a value of 100 ohms. What is the value of the unknown resistor?. 5 ohms. 0.5 ohms. 50 ohms.

In general, increasing the cross sectional area of an electrical cable. increases its resistance. enables it to carry more voltage. enables it to carry more current.

Six resistors each of 6 ohms would be. 1 ohm in series. 1 ohm in parallel. 36 ohms in parallel.

A potentiometer varies. resistance. current. voltage.

The formula for resistance in series is. RT = R1 + R2 + R3 .....Rn. RT = R1 * R2 * R3 .....Rn. 1/RT = 1/( R1 * R2 * R3 .....Rn).

What is the combined value of resistances of 4 ohm and 6 ohm connected in parallel?. 0.24 ohm. 2.4 ohm. 24 ohm.

If a number of resistors are connected in parallel, the total resistance is. smaller than the lowest. the same as the lowest. greater than the lowest.

The resistance to electrical flow in a wire depends on. the diameter, length, material of wire and temperature. the material only - copper or aluminium. the length and material of the wire only.

When resistors are in parallel the total current is equal to. the current through one resistor. the sum of the currents. the reciprocal of all the currents.

Which of these will cause the resistance of a conductor to decrease?. Decrease the length or the cross-sectional area. Increase the length or decrease the cross-sectional area. Decrease the length or increase the cross-sectional area.

If 2 resistors, one red, yellow, black, gold and the other violet, blue, black, silver were replaced by a single resistor. Ignoring tolerance, what would the colour coding be?. Brown, black, brown. Black, brown, black. Brown, black, black.

A 47 kilohm resistor has the following colour code:. Yellow, Violet, Orange. Red, Orange, Yellow. Orange, Violet, Red.

The bridge circuit shown will be balanced when the value of the unknown resistor R is. 2 ohms. 18 ohms. 14 ohms.

A 300 ohm resistor would have a colour code of. orange, brown, black. orange, orange, brown. orange, black brown.

In this circuit, Rx is equal to. R2 * R4 ÷ R3. R3 * R4 ÷ R2. R3 * R2 ÷ R4.

In a parallel circuit containing resistors. the sum of the voltage drops equals applied voltage. the voltage is the same in all parts of the circuit. resistance is determined by value of current flow.

Five different value resistors all have the same voltage dropped across them. How are the resistors connected?. In Series/Parallel. In Series. In Parallel.

Conductance of a circuit is 2 milliMhos. What is its resistance?. 5000 Ohms. 500 Ohms. 5 Megohms.

When light hits a photodiode, its resistance. stays the same. increases. decreases.

A 2 Megohm resistor can be written. 2M0F. 20MF. M20F.

In a Wheatstone bridge at balance the galvanometer reads zero. amps. ohms. volts.

The unit for resistivity is the. ohms/square meter. ohms/meter. ohm.meter.

A 47 Kilohm resistor with a 10% tolerance has the following colour code:. Yellow, Violet, Orange, Silver. Orange, Violet, Red, Gold. Red, Orange, Yellow, Silver.