Electrical Engineering - Series-Parallel Circuits - Discussion
Discussion Forum : Series-Parallel Circuits - General Questions (Q.No. 10)
10.
On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?
Discussion:
19 comments Page 1 of 2.
Ramu said:
1 decade ago
Explanation please.
Manasa said:
1 decade ago
Voltage is inversely proportional to load on the system-i.e as load increases voltage decreases due to v-drops hence they are inversely related. So minimum load pertains to maximum voltage among the given options.
Senthil said:
1 decade ago
Voltage increase means current decrease. So load depends on current. Current decrease so load also minimum.
Kanga said:
1 decade ago
Voltage increase means current decrease. So load depends on current. minimum Current means load also minimum.
Keerthi said:
1 decade ago
V = IR means V directly proportional to I. , then how can we say that, if voltage increases means current will decrease?
Dayal said:
1 decade ago
Here is the concept of relationship between load res & Voltage.
Since load is lesser as per question so the voltage value will be the higher one (having less voltage drop on account of less load in the ckt).
Since load is lesser as per question so the voltage value will be the higher one (having less voltage drop on account of less load in the ckt).
Gbenga said:
1 decade ago
For voltmeter, the maximum load current and maximum load Resistor is fixed.
i.e. the maximum voltage is fixed. Read or measured voltage in excess of this are dropped across an added series resistor.
So, Vtest = Vmeter + Vseries.
= Vmeter + Imeter * Rseries.
Since Vmeter and Imeter are fixed.
=> Vtest proportional to Rseries.
So, increasing Vtest will reqire increasing Rseries.
Also Rtotal = Rmeter + Rseries.
i.e. the maximum voltage is fixed. Read or measured voltage in excess of this are dropped across an added series resistor.
So, Vtest = Vmeter + Vseries.
= Vmeter + Imeter * Rseries.
Since Vmeter and Imeter are fixed.
=> Vtest proportional to Rseries.
So, increasing Vtest will reqire increasing Rseries.
Also Rtotal = Rmeter + Rseries.
Yamini upadhyay said:
1 decade ago
Explain please, this explanation is not clearing my doubt voltmeter present minimum load on the circuit.
Jay tiwari said:
1 decade ago
@Yamini.
Voltmeter present means voltmeter shown minimum load on the circuit its means current flow in circuit is low then voltmeter shown volt in maximum value. So we say voltage range 1000v.
Voltmeter present means voltmeter shown minimum load on the circuit its means current flow in circuit is low then voltmeter shown volt in maximum value. So we say voltage range 1000v.
(1)
Jay tiwari said:
1 decade ago
@Yamini.
No its not possible to measure the load with voltage which is present by a voltmeter. But its true.
Voltage is inversely proportional to load on the system i.e. as load increases voltage decreases. But we can't measure individual voltmeter we need flowing current or opposing resistance.
No its not possible to measure the load with voltage which is present by a voltmeter. But its true.
Voltage is inversely proportional to load on the system i.e. as load increases voltage decreases. But we can't measure individual voltmeter we need flowing current or opposing resistance.
(1)
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