Book Store

Download books and chapters from book store.
Currently only available for
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for
Class 10 Class 12

વિદ્યુતપ્રવાહની ચુંબકીય અસરો

થર્મોકપલનું પ્રતિતાપમાન

bold 620 bold degree bold space bold C

અને તટસ્થ તાપમાન

bold 300 bold degree bold space bold C

છે. તો ઠંડા જંક્શનનું તાપમાન કેટલું હશે ?

$bold 40 bold degree bold space bold C$
$bold 20 bold degree bold space bold C$
$bold 320 bold degree bold space bold C$
$bold minus bold 20 bold space bold degree bold C$

R₁ અને R₂ અવરોધો સમાંતરમાં જોડેલા છે. તેમાંથી પ્રવાહ પસાર કરતાં ઉદભવતી ઉષ્મા H₁ અને H₂ હોય તો $bold H subscript bold 1 over bold H subscript bold 2 bold space bold equals bold space bold. bold. bold. bold. bold. bold. bold. bold. bold. bold. bold. bold.$

$bold R subscript bold 2 over bold R subscript bold 1$
$bold R subscript bold 1 over bold R subscript bold 2$
$fraction numerator bold R subscript bold 1 superscript bold 2 over denominator bold R subscript bold 2 superscript bold 2 end fraction$
$fraction numerator bold R subscript bold 2 superscript bold 2 over denominator bold R subscript bold 1 superscript bold 2 end fraction$

bold R subscript bold 2 over bold R subscript bold 1

Tips: -

સમાંતર જોડાણ માટે V અચળ હોવાથી $bold H bold space bold equals bold space bold V to the power of bold 2 over bold R$ પરથી $bold H subscript bold 1 over bold H subscript bold 2 bold space bold equals bold space bold R subscript bold 2 over bold R subscript bold 1$

1.5 m લંબાઈ ધરાવતા એક સુરેખ તારમાં 10 A પ્રવાહ પસાર થાય છે. આ વાહકને 2 T તીવ્રતાવાળા ચૂંબકીય ક્ષેત્રમાં મૂકતાં તેની પર 15 N જેટલું બળ લાગે છે તો ચૂંબકીય ક્ષેત્ર અને પ્રવાહની દિશા વચ્ચેનો કોણ કેટલો મળે ?

$<pre>uncaught exception: Http Error #404 in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/HttpImpl.class.php line 61 #0 [internal function]: com_wiris_plugin_impl_HttpImpl_0(Object(com_wiris_plugin_impl_HttpImpl), NULL, 'http://www.wiri...', 'Http Error #404') #1 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/php/Boot.class.php(769): call_user_func_array('com_wiris_plugi...', Array) #2 [internal function]: _hx_lambda->execute('Http Error #404') #3 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/haxe/Http.class.php(532): call_user_func_array(Array, Array) #4 [internal function]: haxe_Http_5(true, Object(com_wiris_plugin_impl_HttpImpl), Object(com_wiris_plugin_impl_HttpImpl), Array, Object(haxe_io_BytesOutput), true, 'Http Error #404') #5 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/php/Boot.class.php(769): call_user_func_array('haxe_Http_5', Array) #6 [internal function]: _hx_lambda->execute('Http Error #404') #7 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/HttpImpl.class.php(27): call_user_func_array(Array, Array) #8 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/haxe/Http.class.php(444): com_wiris_plugin_impl_HttpImpl->onError('Http Error #404') #9 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/haxe/Http.class.php(458): haxe_Http->customRequest(true, Object(haxe_io_BytesOutput), NULL, NULL) #10 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/HttpImpl.class.php(40): haxe_Http->request(true) #11 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/TextServiceImpl.class.php(80): com_wiris_plugin_impl_HttpImpl->request(true) #12 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/service.php(19): com_wiris_plugin_impl_TextServiceImpl->service('mathml2accessib...', Array) #13 {main}</pre>$
$bold 45 bold degree$
$bold 60 bold degree$
$bold 90 bold degree$