What is the resistance of a lamp when a voltage of 12 V across it causes a current of 4 A?

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Answer 1 · 2018-06-28T11:57:17

The answer is #=3Omega#

Apply Ohm's Law

#"Voltage" = "Current " xx"Resistance"#

#U=RI#

The voltage is #=12V#

The current is #I=4A#

The resistance is

#R=U/I=12/4=3Omega#

The answer is #=3Omega#

Answer 2 · 2018-06-28T13:11:22

#3# ohms.

Resistance is given by the equation:

#R=V/I#

where:

#R# is the resistance in ohms

#V# is the voltage in volts

#I# is the current in amperes

Therefore, we get:

#R=(12 \ "V")/(4 \ "A")#

#=3 \ Omega#